<casper....@oracle.com> wrote:
> >It gets even better. Executables become part of the swap space via
> >mmap, so that if you have a lot of copies of the same process running in
> >memory, the executable bits don't waste any more space (well, unless you
> >use the sticky bit, although that might be deprecated, or if you copy
> >the binary elsewhere.) There's lots of awesome fun optimizations in
> >UNIX. :)
>
> The "sticky bit" has never been used in that form of SunOS for as long
> as I remember (SunOS 3.x) and probably before that. It no longer makes
> sense in demand-paged executables.
SunOS-3.0 introduced NFS-root and swap on NFS. For that reason, the meaning of
the sticky bit was changed to mean "do not cache write this file".
Note that SunOS-3.0 appeared with the new Sun3 machines (first build on
24.12.1985).
Jörg
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